package org.json;

/*
 * Copyright (c) 2002 JSON.org Permission is hereby granted, free of charge, to any person obtaining a copy of this
 * software and associated documentation files (the "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
 * Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The
 * above copyright notice and this permission notice shall be included in all copies or substantial portions of the
 * Software. The Software shall be used for Good, not Evil. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
 * KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
 * PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

/**
 * The HTTPTokener extends the JSONTokener to provide additional methods for the parsing of HTTP headers.
 * 
 * @author JSON.org
 * @version 2010-12-24
 */
public class HTTPTokener extends JSONTokener {

    /**
     * Construct an HTTPTokener from a string.
     * 
     * @param string A source string.
     */
    public HTTPTokener(final String string) {
        super(string);
    }

    /**
     * Get the next token or string. This is used in parsing HTTP headers.
     * 
     * @throws JSONException
     * @return A String.
     */
    public String nextToken() throws JSONException {
        char c;
        char q;
        final StringBuffer sb = new StringBuffer();
        do {
            c = next();
        } while (Character.isWhitespace(c));
        if (c == '"' || c == '\'') {
            q = c;
            for (;;) {
                c = next();
                if (c < ' ')
                    throw syntaxError("Unterminated string.");
                if (c == q)
                    return sb.toString();
                sb.append(c);
            }
        }
        for (;;) {
            if (c == 0 || Character.isWhitespace(c))
                return sb.toString();
            sb.append(c);
            c = next();
        }
    }
}
